Truck cap



FIG. 1 is a perspective view of the top, front and one side of a truck cap showing my new design;

FIG. 2 is a perspective view of the top, rear and opposite side thereof;

FIG. 3 is an enlarged front elevation view thereof;

FIG. 4 is an enlarged side elevation view thereof;

FIG. 5 is an enlarged rear elevation view thereof; and,

FIG. 6 is an enlarged top plan view thereof.

The broken line showing of environmental structure is for illustrative purpose only and forms no part of the claimed design. 

The ornamental design for a truck cap, as shown and described. 